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Finding the Fourth Proportional to 230,540.79, 318,147.69 and 128,572.74

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Solution

The fourth proportional to 230,540.79, 318,147.69 and 128,572.74 is: 177,431.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,540.79 : 318,147.69 = 128,572.74 : x
  2. Step 2: Convert to fraction form
    230,540.79/318,147.69 = 128,572.74/x
  3. Step 3: Cross multiply
    230,540.79x = 318,147.69 × 128,572.74
  4. Step 4: Simplify right side
    230,540.79x = 40,905,120,227.97
  5. Step 5: Solve for x
    x = 40,905,120,227.97/230,540.79
  6. Step 6: Final answer
    x = 177,431.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.